feat(restic): add scripts for directory backup and snapshot metrics generation

roles/restic/files/restic-generate-snapshot-metrics.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+RESTIC_JSON=$(</dev/stdin)
+
+echo $RESTIC_JSON | jq -r '.[]
+    | {
+        "hostname": .hostname,
+        "username": .username,
+	"short_id": .short_id,
+        "time": ((((.time | split(".")[0]) + "Z") | fromdate) - (3600 * (.time | split("+")[1] | split(":")[0] | tonumber + 1))),
+        "paths": .paths[]
+    } | "restic_snapshots{hostname=\"\(.hostname)\",username=\"\(.username)\",short_id=\"\(.short_id)\",paths=\"\(.paths)\"} \(.time)"'